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Generative Language Intervention for Young Children With Down Syndrome Using Augmentative and Alternative

Jennifer Kent-Walsh1, Nancy Harrington1, Debbie Hahs-Vaughn2

  • 1School of Communication Sciences and Disorders, University of Central Florida, Orlando.

Language, Speech, and Hearing Services in Schools
|June 30, 2025
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Summary
This summary is machine-generated.

The AAC Generative Language Intervention (AAC-GLI) approach significantly improved expressive grammar skills in young children with Down syndrome. This intervention is crucial for enhancing communication abilities in this population.

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Area of Science:

  • Speech-Language Pathology
  • Developmental Disabilities
  • Augmentative and Alternative Communication

Background:

  • Children with Down syndrome often exhibit speech intelligibility issues, potentially masking their true language and cognitive abilities.
  • Augmentative and Alternative Communication (AAC) can address these communication challenges, but consistent language intervention is often lacking.
  • Misconceptions about competence can arise due to speech difficulties in children with Down syndrome.

Purpose of the Study:

  • To assess the impact of the AAC Generative Language Intervention (AAC-GLI) on the aided expressive grammar of young children with Down syndrome.
  • To determine if AAC-GLI can enhance grammatical production in aided communication for this population.

Main Methods:

  • A randomized controlled trial design was employed.
  • Participants received AAC devices and participated in AAC implementation workshops.
  • The intervention group received 4 months of twice-weekly play-based AAC-GLI sessions.
  • Progress was measured using weighted Mean Length of Utterance in Symbols (W-MLUSym).

Main Results:

  • The intervention group demonstrated significantly superior performance in W-MLUSym.
  • These positive results were observed despite challenges related to COVID-19, including reduced enrollment and increased attrition.

Conclusions:

  • The AAC-GLI approach is effective in improving aided expressive grammar skills for young children with Down syndrome.
  • Targeted AAC language intervention is vital for supporting expressive language development and functional communication in children with Down syndrome.